Can cover



FIG. 1 is an upper perspective view of a can cover positioned on abroken line can showing the new design;

FIG. 2 is a front side elevation view of the new design, and the rearside elevation view thereof is the same as the front side elevationview;

FIG. 3 is a left side elevation view of the new design, and the rightside elevation view thereof is the same as the left side elevation view;

FIG. 4 is a top plan view of the new design; and,

FIG. 5 is a bottom plan view of the new design.

The features illustrated in broken lines in the figures do not form apart of the claimed design.

The ornamental design for a can cover, as shown and described.